diff --git a/scrapy/core/downloader/handlers/http11.py b/scrapy/core/downloader/handlers/http11.py
index 8b4ae6b24..f0ed1a4af 100644
--- a/scrapy/core/downloader/handlers/http11.py
+++ b/scrapy/core/downloader/handlers/http11.py
@@ -141,14 +141,8 @@ class TunnelingTCP4ClientEndpoint(TCP4ClientEndpoint):
         self._protocol.dataReceived = self._protocolDataReceived
         respm = TunnelingTCP4ClientEndpoint._responseMatcher.match(self._connectBuffer)
         if respm and int(respm.group('status')) == 200:
-            try:
-                # this sets proper Server Name Indication extension
-                # but is only available for Twisted>=14.0
-                sslOptions = self._contextFactory.creatorForNetloc(
-                    self._tunneledHost, self._tunneledPort)
-            except AttributeError:
-                # fall back to non-SNI SSL context factory
-                sslOptions = self._contextFactory
+            # set proper Server Name Indication extension
+            sslOptions = self._contextFactory.creatorForNetloc(self._tunneledHost, self._tunneledPort)
             self._protocol.transport.startTLS(sslOptions,
                                               self._protocolFactory)
             self._tunnelReadyDeferred.callback(self._protocol)